AN/SPG-55

The AN/SPG-55 was a tracking / illumination radar for Terrier and RIM-67 Standard missiles (SM-1ER/SM-2ER). It was used for target tracking and Surface-to-air missile guidance on numerous ships including Kitty Hawk-class aircraft carriers,Belknap-class cruisers, Leahy-class cruisers and Farragut class destroyers. It was also used on the nuclear-powered single units USS Long Beach (CGN-9), USS Bainbridge (CGN-25) and USS Truxtun (CGN-35). The SPG-55 was part of the Mk 76 missile fire control system.

Name

The designation "AN" stands for "Army-Navy" while "SPG" is not an acronym, but part of the MIL-STD-196E Type Designation System:

First letter (installation) - S = Water (surface ship)

Second letter (type of equipment) - P = Radar

Third letter (purpose) - G = Fire Control or Searchlight Directing

Variants

AN/SPG 55 - Original version supported Beam riding Terrier missiles.

AN/SPG 55A - Supported Beam-riding and homing Terrier missiles

AN/SPG 55B - Supported Beam-riding and homing Terrier missiles as well as newer Standard missiles.

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SPG

SPG is a three-letter initialism, which can have different meanings:

Activities

Submersible pressure gauge used in scuba diving

Shortest proof game, a type of chess problem

Steals per game, a statistic in basketball

Language

Sarong Party Girl, a derogatory Singaporean term describing a local Asian woman who exclusively dates and prefers Caucasian men

Spelling Punctuation and Grammar, often used in internet forums, when one user complains that another has made an SPG error

Organizations

Shapoorji Pallonji Group, an Indian business conglomerate

Society for the Propagation of the Gospel in Foreign Parts, a missionary society of the Church of England, from 1701 to present

Space Propulsion Group, an aerospace company developing hybrid rocket technology

SPG, Special Patrol Group, a former unit of the Metropolitan Police

SPG, Special Patrol Group (RUC), a former unit of the Royal Ulster Constabulary

Special Protection Group, the organization responsible for protecting the Prime Minister of India and the Prime Minister's family

SPG23

Spastic paraplegia 23 (autosomal recessive) is a protein that in humans is encoded by the SPG23 gene.

References

SPG-82

The SPG-82 (transliterated Russian: Stankovyi Protivotankovyi Granatomet - heavy antitank grenade launcher) was a Soviet wheeled antitank rocket launcher that entered service after the end of the Second World War. It was replaced in Soviet service by the B-10 recoilless rifle from 1954 but remained in service with some armies, notably in the Middle East until the 1970s. SPG 83 also used by BRIMOB (Indonesia Police Mobile Brigade) during guarding PAPERA in Bandung, 1963

Description

The weapon consists of a long barrel tube with a flared muzzle, supported by a simple carriage with two small solid wheels. A curved shoulder pad is attached to left side of the barrel, and a large shield is fitted to protect the crew from the back-blast produced by the rocket projectiles. The shield is not thick enough to provide protection from enemy fire. The weapon is normally fired from the carriage, but it can be dismounted and shoulder fired by two men working together to support the weapon.

The weapon fires two types of projectiles, a general purpose explosive/fragmentation round, the OG-82, and an armour piercing anti-tank round, the PG-82. It has two sets of iron sights corresponding to the two different rounds fired by the weapon. The HE sight is graduated out to 700 meters while the weapon's effective range for the HEAT round is around 200 meters.